Daily Chinese Idiom Guessing Game
To be at a loss as to what to do; flustered and uncertain.
措安放。手脚不知放到哪儿好。形容举动慌张，或无法应付。
《论语·子路》刑罚不中，则民无所措手足。”
When the teacher asked him a question he hadn't prepared for, he was at a loss, his hands and feet having no place.